Cement-packing machine.



, A. V. JENSEN.

CEMENT PACKING MACHINE.

wmqmou FILED OCT. :4, 1915.

1,259,993. Patented Mar. 19, 1918.

cement UNITED STATES PATENT OFFICE.

CEMENT-PACKING MACHINE. I

Specification of Letters Patent.

Patented Mar. '19, 1918.

' application filed October 14, 1915. Serial uh. 55,844.-

To all whom it may concern I Be it known that I, ALnx NmiRV. JENSEN citizen of the United States, and resident oi in the county of Morgan and Devils Slide, State of Utah, have invented certain new and useful Improvements in Cementdzicking Machines, of which the following is a specification. t I

This invention relates to improvements in weighing mechanisms. More particularly this invention relates to an improved weighing'mechanisxn adapted for use with cement packing and weighing machinery or other similar devices.

The object of the ii'ivention is a general improvement of the weighin mechanism itself together with provisions or the prevention of unintentional short weighing. Another object is to provide a mechanism of simple and efficient construction adapted to be attachcd or applied to existing 'machineswith out requiring but few, if any, chan esjin their construction and operation. T e invent1on is shown as applied to a cement packing machine but is not intended to be limited to such machines. In the cement industry And, shipped contain the standardmeasure of the material which is usually, i if not always, ninety-five pounds. .The' machines areoperated very rapidly and it is therefore a frequent occurrence that the bags areunins inaftcrr described and as illustrated in the accompanying drawing in which- Figure 1- is'a vertical sectional view ofa packing and weighing-machine embodying my invention with parts omitted and showing the various parts in the position when the cement bag is almost fille Fig. 21s a similar view of the weighing mechanism showing the parts in the position when the bag of cement is completely.

filled and illustrates in dotted lines the operation of removing the filled .-bag from the machine.

Fig. 3 is a front View of the weighing mechanism, and j it is very important on its sides 18 that the bags in which the cement is packed Accordingly my invention compriscsi'shch parts and combinations thereof'as are'here Fig. '4. .8. Ian detail View of in.the other. gures.

the frame of the machine. 2 is the main or feeder shaft to which power is supplied in any suitable manner, not shown. The feeder shaft revolves within a feed box 12 which is located below and forms a continuation of a hopper 8 into which the cement is fed byv any suitable means,not shown. The feed shaft'carries-a feeder 13comprising a pluralityof blades 14. The feeder rotates at. very high speed and discharges the cement into the spout 15 from the. feed lgox 12. The spout is inserted through a valve in the bag 16 which valve is diagrammatically indicated at 17.

- The bag is supported partly on the spout,

but the greater we1ght of the bag when it is filled is supported in the bag chair 18 which is in the form of a large loop having a bot-.

tomand sides 18. The sides mergeat the top at 20 inaivot which is connected to a rod 3 pivoted? within the hopper 8 and whereby the chair is supported at the top.-

' The chair is provided with scale cups 21 on the outside thereof, one on each side, by means of which-the chair rests on corresponding scale points 22 onthe scale beam 23, which is'i'orked to enable it to parts shown .In Fig. 1 the reference numeral. 1 denotes,

pass ontheoutside of the chair as will be understood." Thescale beam rests upon knife edges-2 L supported 'on theifi 'ame at 25 and carries theweight 26, which may be adjusted by. screw 5' in threaded engagement with the weight as shown. 6 is an adjustable weight stop.

' The sides 18 of the chair are connected by a brid 31 to which the spout 15 is suitably secure Y b a support 32. Secured" to the :bridge' 31' is also a clamp bracket 33 to which ispivoted-at 34 a sack clamp 35 adapted to clamp the sack to the spout. aforesaid with the c air.-

All of the artsfare supported on and move.

40 isa discharge lever which is formedas an'A-fmrne and which is movable outside the A-frame 18 and ivoted on the latter at 10. The discharge ever has two sidesdt) dried by straps'IO "and 84 and the bottom 0. The discharge leverhas also a hookfi at the top' near the handle 43. The hook is' provided with an adjustable stop 65. .66 is a a. spring whi ch urges the hook 44 downwardly into engagement with a second hook 47 fixed to the chair 18. A clamp releasing rod 80 is pivoted to the sack clamp as shown and is mounted to slide on the chair inthe bracket 81. 82 is an adjustable collar on the 5 rod 80 which is ad'usted a predetermined distance above the orked hook 44 through which the rod passesyso that said collar 82 is almost in contact with the art of the upper face of the hook 44 imme lately below.

The ba straps and 84 are set back a suflicient distance from the sides of the filled bag 16, which hangs on the spout 15 supported by bag sup orts 85 and 86, thus avoiding any inter erence with obtaining the proper weight in the bag. 83 is a stop for the bag chair 18.

The operation is as follows: The weight 26 is adjusted tocounter-balance the weight of the chair with the parts thereon plus the required weight of cement to be filled in the bag. The scale beam therefore rests on stop. 6 maintainingrthe chair in its upper position as shown in ig. 1 with the book 44 in engagement with the book 47 and the spout 15 in register with the discharge opening 51 of the feed box 12. A sack is pushedin over the spout 15 and held againstaccidental removal by the clam 35 as is obvious. Thereafter the cut-oil s ide 52, Fig. 2, is operated and. cement is discharged b the feeder 13, through outlet 51, throng the receiving spout 15 and bag valve 17 into the bag. When the bag is nearly full, its weight causes a downward movement of the chair against the wei ht 26. When the full quantity of cement as enterecLthe bag, the weight thereof causes the chair to move to its lowermost position and the rear end of the scale beam moves up until stopped by the adjustable stop 75. The parts are then in the osition shown in Fig. 2 where it will be 0 served that the spout 15 is out of register with the outlet 51 and also that the hook 47 has cleared the hook 44. The filled bag is now lar ely supported by the bottom or scoop 60. he operator now takes hold of the handle 3 and tilts the discharge lever outwardly.

During the first part of this movement, the

inclined upper face 87 of the hook 44 contacts with the collar 82 and forces the rod 80 upward together with the bag clamp 35 thus automatically releasing the bag, permitting it to be removed from the spout 15 by further tilting. As soon as the bag falls out of the discharge frame, the weight. 26 causes the chair to rise.) I The operator there- ,a on moves the discharge lever back into position and thebevel faces 76 on the hooks 44 and 47 slide against each other and permitting them to interlock after which the operation may be repeated.

During the operation it will be noted that it is impossible for the operator to operate the discharge levereto'remove the bag beei fore i115 oompleteliy filled, or filled to connterbalanee the weight 26. Thus unintentional short weighin is prevented. The operation of these mac ines is 'ver :pid and the operator is busy observing to various chairs to see whether they are on the down ward move and ready to be operated, he

having usually two to three machines to attend to at one time. Consequently, his hand is grasping the handle 43 as soon as possible in order to remove the filled bag.' But he cannot pull the handle toward him before the hooks 44 and 47 have become disengaged, and what is of particular importance in this invention, he cannot unintentionally short weigh by pressing down upon the handle,

which he is apt to do, because such pressure does not affect the weighing operation.

It will also be noted as one of the features of this invention that the discharge lever remains stationary during the weighing operation, while in several makes of machines of this kind, the discharge lever and chair move together. I

he machine is not limited to the exact form shown and described and the invention maybe embodied in other structures without departing from the principle of the invention or the scope of the claims.

I claim 1. In a bag filling machine a weighing mechanism, a bag support thereon, means mounted independent of said weighing mechanism for removing the bag there-from.

2. In a bag filling machine a weighing mechanism, a bag support thereon, means mounted independent of said weighing mechanism for removing the bag therefrom and means preventing said removal before the bag has been filled with a predetermined quantity of material.

3. In a bag filling machine a weighing.

mechanism, a bag support thereon, means mounted independent of said weighing mechanism for removing the bag therefrom and automatic means preventing said removalbefore the bag has been fil ed with a predetermined quantity of material.

4. In a bag filling machine a weighing mounting said discharge lever separate from the said weighing mechanism.

'6. In a bag filling machine a weighing khechanism, a bag support thereon, a dig- 3 charge device for removing" the bag there- Signed at Devils Slide, in the county of from when the bag has been filled with a .Morganand State of Utah, this eleventh day predetermined quantity of material, locking of October, A. D. 1915.

means for preventing premature operation ALEXANDER V. JENSEN. 'of said discharge device and means for en Witnesses: porting the latter independent of said Enwm A. WILDE, weighing mechanism. J. A. Hymn 

